Image:Pedalboard (995939579).jpg|thumb|right|400px|A guitar pedal board, comprising several EHX pedals, including a Big Muff, POG (polyphonic octave generator), a Stereo Pulsar tremolo and a Tube EQ.
'''Electro-Harmonix''' is a New York City|New York
-based company that makes high-end electronic audio processors and sells rebranding|rebranded vacuum tube
s. The company was founded by Mike Matthews in 1968. It is best known for a series of popular guitar effects pedal
s introduced in the 1970s and 1990s.
During the mid-1970s, Electro Harmonix had established itself as a pioneer and leading manufacturer of guitar effects pedals. Electro-Harmonix was the first company to introduce, manufacture, and market affordable state-of-the art "stomp-boxes" for guitarist and bassists, such as the first stomp-box Flanging|flanger
('''Electric Mistress'''), the first analog Delay (audio effect)|echo/delay unit
with no moving parts ('''Memory Man'''),...